Technical term and its abbreviation 2003/1/9
| Abb. | Term | unit |
| (1+i)^n | Final worth factor or compound amount factor | - |
| 1 / [(1+i)^n] | Present worth factor | - |
| A | Field area | ha |
| Aa | Annual operation area | ha/year |
| Abp | Break-even point of area | ha |
| ACa | Annual cost per hectare | $/ha |
| ACh | Annual cost per hour | $/h |
| AD | Annual depreciation | $/year |
| ADR | Rate of available work days | % |
| AEG | Total annual energy consumed | MJ |
| AFC | Annual (total) fixed cost | $/year |
| AFC | Annual fixed cost | $ |
| AFCa | Annual fixed cost per ha | $/ha |
| AFCh | Annual fixed cost per hour | $/h |
| AG | Annual garage cost | $/year |
| AGt | Total garage cost per year | $/year |
| AI | Annual interest | $/year |
| AIm | Yearly mean interest | $/year |
| ANWH | Available net working hour | h |
| AP | Annual insurance fee | $/year |
| AP(n) | Adjusted annual payments of worth after n year usage | $ / year |
| AR | Annual repair cost | $/year |
| AR | Annual repairing cost | $/year |
| AT | Annual taxes | $/year |
| ATC | Annual (total) cost | $/year |
| ATC-ca | Total Cost at area = coverage | $ |
| ATCa-ca | Cost per ha at area = coverage | $/ha |
| AVC | Annual (total) variable cost | $/year |
| AVCa | Annual variable cost per ha | $/ha |
| AVCh | Annual variable cost per hour | % |
| AWD | Available work days | d |
| B | Benefit, Profit | $ |
| Bp | Break even point | $ |
| C | Cost | $ |
| CA | Coverage (Covered area) | ha |
| CA | Coverage | ha |
| CAP | Capital | $ |
| CAS | Coverage of one set | ha |
| CC | Custom charge | $/ha |
| CC | Customary service charge | $/ha |
| CI | Farm work cost index | in decimal |
| Cv | Variable cost per ha | $/ha |
| D | Annual depreciation | $/year |
| Da | Adjustment time | h: min: s |
| Db | Short brake time or time for non operation or lunch time | h: min: s |
| DC | Daily Capacity | ha/d |
| Dc | Time for cleaning of farm machines | h: min: s |
| DCF | Diesel light oil Conversion factor | MJ/ L |
| Df | Time for feeding | h: min: s |
| Di | Depreciation charge for i year | $ |
| Dm | Moving or traveling time | h: min: s |
| Dn | Net Work hours per day | h/d |
| Dn | Net working hours | h |
| Dp | Preparation time of work | h: min: s |
| Dr | Repairing time | h: min: s |
| Ds | Time for setting | h: min: s |
| Dt | Total daily working hours | h/d |
| Dt | Working hours per day | h/d |
| DWP | Days of work period | d |
| E | Final worth after n years | $ |
| ECF | Electric power Conversion factor | MJ / kWh |
| ECU | Energy conversion unit for manufacturing the machinery by using input-output table of inter-industry | kJ / Yen |
| ef | Field Efficiency in decimal | in decimal |
| EF | Field Efficiency in percentage | % |
| EFC | Effective field capacity | ha/h |
| EFCp | Effective Field Capacity of plural works | ha/h |
| er | Overall repair cost coefficient | in decimal |
| erh | repair cost coefficient per hour | /h |
| FC | Fixed cost | $ |
| FCa | Fixed cost per ha | $/ha |
| FCh | Fixed cost per hour | $/h |
| FRa | Fuel consumption rate per ha | L/ha |
| FRh | Fuel consumption rate per hour | L/h |
| G | Gross income, Revenue | $ |
| GCF | Gasoline Conversion factor | MJ/ L |
| Ha | Annual operation hour | h/year |
| i | Annual interest | in decimal |
| I | Investment | $ |
| INT | Function of getting integer | - |
| KCF | Kerosene Conversion factor | MJ/ L |
| L | Durability Year | year |
| L | Economic life | year |
| LBP | Labor productivity (SH) | $/h |
| LDP | Land productivity | $/ha |
| LR | Land rent | $/ha |
| M | Number of machine set | in decimal |
| M(n) | Adjusted annual payments of worth after n year usage | $/year |
| MA No. | Machinery ID Number | - |
| MH | Man-hours | man*h |
| Mha | Man-hours per ha | man*h/ha |
| Mi | Number of machine set of farm work(i) | - |
| MRa | Material usage rate per ha | kg/ha |
| Msys | Number of machinery set of system | - |
| N | Number of operation times | - |
| NI | Net income, Return | $ |
| NOA | Number of attachments | - |
| Ns | Number of machine set | - |
| Nw | Number of workers | - |
| NWR | Daily net working rate | % |
| OC | Operating Cost | $/ha |
| P | Initial price | $ |
| P | Purchase price | $ |
| P | Weight of production, grain etc. | t |
| P | Present worth | $ |
| P(n) | Annual present worth after n year | $ / year |
| Pf | Fuel price per litter | $/L |
| Pi | Initial price | $ |
| Pm | Material price per kg | $/kg |
| PR | Profit | $ |
| PR-max | Total Profit: maximum | $ |
| PRa-max | Profit per ha: maximum | $/ha |
| PS-ca | Total Sales at area = coverage | $ |
| PSa | Sales per ha | $/ha |
| Q(n) | Annual timeliness cost after n year | $ / year |
| Qj | Timely cost etc. in j year | $ |
| r | Constant depreciation rate | in decimal |
| R | Remaining value | $ |
| R(n) | Annual repairing cost after n year | $ / year |
| RAF | Annual fixed cost rate | % |
| raf | Annual fixed cost rate | in decimal |
| RCF | Rice grain Conversion factor | MJ/ kg |
| RCh | Mean repair cost per hour | $/h |
| RD | Annual depreciation rate | % |
| RF | Fixed cost rate | % |
| RG | Annual garage cost rate | % |
| rgc | Garage cost rate | in decimal |
| RI | Annual interest rate | % |
| rf | Fixed cost rate | in decimal |
| Ri | Remained value of i year | $ |
| ri | Yearly interest rate | in decimal |
| Rj | Repairing cost in j year | $ |
| RP | Annual insurance rate | % |
| rp | Premium rate | in decimal |
| RR | Annual repairing cost rate | % |
| RT | Annual taxes rate | % |
| rtax | Tax rate (0.5%) | in decimal |
| S | Sale amount, Gross income | $ |
| S | Salvage value, Disposal value, Remaining value | $ |
| S(n) | Annual remaining value after n year | $ / year |
| Sg | Garage space of machine | m**2 |
| SH | Sales per working hour | $/h |
| Sn | Remaining value after n years | $ |
| Sp | Share of work | % |
| St | Total garage space of house | m**2 |
| T | Total time required a farm work | h |
| t1 | U type turning time | s |
| t2 | Δ type turning time | s |
| ta | Actual operating time | h: min: s |
| tb | Turning time | h: min: s |
| tc | Moving time in field | h: min: s |
| td | Regulating time | h: min: s |
| te | Rest time | h: min: s |
| TFC | Theoretical Field Capacity | ha/h |
| TFW | Total number of farm works | - |
| TM | Total number of kind of machine | - |
| TOW | Type of work: M= Machine, C= Contract, L= Manual, A= Animal | - |
| v, V | Operating speed | m/s |
| VC | Total variable cost of a farm work | $ |
| VCa | Total variable cost per ha | $/ha |
| VCF | Variable cost per hour originated from fixed cost | $/h |
| VCh | Total variable cost per hour of a farm work | $/h |
| VCLBh | Variable cost per hour: labor | $/h |
| VCMCh | Variable cost per hour: machine | $/h |
| VCMTh | Variable cost per hour: material | $/h |
| VF | Fuel cost of a farm work | $ |
| VFh | Fuel cost per hour of a farm work | $/h |
| VL | Lubricant cost of a farm work | $ |
| VLh | Lubricant cost per hour of a farm work | $/h |
| VM | Material cost of a farm work | $ |
| VMh | Material cost per hour of a farm work | $/h |
| VR | Repairing cost of a farm work | $ |
| VRh | Repairing cost per hour of a farm work | $/h |
| Vt | Theoretical operation speed | km/h |
| VW | Labor cost of a farm work | $ |
| VWh | Labor cost per hour of a farm work | $/h |
| w, W | Operating width | m |
| WC | Work Capacity | h/ha |
| WCi | Work Capacity of farm work(i) | h/ha |
| WCp | Work Capacity of plural works | h/ha |
| WP | Cultivation (operation) period | - |
| Wt | Theoretical operation width | m |
| x | Width of field | m |
| y | Length of field | m |
| Y | Yield or amount per hectare | t/ha |
| Yrate | Yen exchange rate | Yen/$ |